source: trunk/src/gui/painting/qpainterpath_p.h@ 781

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#ifndef QPAINTERPATH_P_H
#define QPAINTERPATH_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "QtGui/qpainterpath.h"
#include "QtGui/qregion.h"
#include "QtCore/qlist.h"
#include "QtCore/qvarlengtharray.h"

#include <qdebug.h>

#include <private/qvectorpath_p.h>
#include <private/qstroker_p.h>

QT_BEGIN_NAMESPACE

class QPainterPathStrokerPrivate
{
public:
    QPainterPathStrokerPrivate();

    QStroker stroker;
    QVector<qfixed> dashPattern;
    qreal dashOffset;
};

class QPolygonF;
class QVectorPathConverter;

class QVectorPathConverter
{
public:
    QVectorPathConverter(const QVector<QPainterPath::Element> &path, uint fillRule, bool convex)
        : pathData(path, fillRule, convex),
          path(pathData.points.data(), path.size(),
               pathData.elements.data(), pathData.flags) {}

    const QVectorPath &vectorPath() {
        return path;
    }

    struct QVectorPathData {
        QVectorPathData(const QVector<QPainterPath::Element> &path, uint fillRule, bool convex)
            : elements(path.size()),
              points(path.size() * 2),
              flags(0)
        {
            int ptsPos = 0;
            bool isLines = true;
            for (int i=0; i<path.size(); ++i) {
                const QPainterPath::Element &e = path.at(i);
                elements[i] = e.type;
                points[ptsPos++] = e.x;
                points[ptsPos++] = e.y;
                if (e.type == QPainterPath::CurveToElement)
                    flags |= QVectorPath::CurvedShapeMask;

                // This is to check if the path contains only alternating lineTo/moveTo,
                // in which case we can set the LinesHint in the path. MoveTo is 0 and
                // LineTo is 1 so the i%2 gets us what we want cheaply.
                isLines = isLines && e.type == (QPainterPath::ElementType) (i%2);
            }

            if (fillRule == Qt::WindingFill)
                flags |= QVectorPath::WindingFill;
            else
                flags |= QVectorPath::OddEvenFill;

            if (isLines)
                flags |= QVectorPath::LinesShapeMask;
            else {
                flags |= QVectorPath::AreaShapeMask;
                if (!convex)
                    flags |= QVectorPath::NonConvexShapeMask;
            }

        }
        QVarLengthArray<QPainterPath::ElementType> elements;